/*
* Copyright © 2014 Cask Data, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package co.cask.cdap.data2.datafabric.dataset.service.mds;
import co.cask.cdap.api.dataset.Dataset;
import co.cask.cdap.common.conf.CConfiguration;
import co.cask.cdap.data.Namespace;
import co.cask.cdap.data2.datafabric.DefaultDatasetNamespace;
import co.cask.cdap.data2.datafabric.dataset.DatasetMetaTableUtil;
import co.cask.cdap.data2.dataset2.DatasetFramework;
import co.cask.cdap.data2.dataset2.DatasetManagementException;
import co.cask.cdap.data2.dataset2.NamespacedDatasetFramework;
import co.cask.cdap.data2.dataset2.tx.TransactionalDatasetRegistry;
import co.cask.tephra.TransactionSystemClient;
import com.google.common.collect.ImmutableMap;
import com.google.inject.Inject;
import com.google.inject.name.Named;
import java.io.IOException;
import java.util.Map;
/**
* Allows transactional operations with datasets metadata.
*/
public class MDSDatasetsRegistry extends TransactionalDatasetRegistry<MDSDatasets> {
private final DatasetFramework dsFramework;
private DatasetMetaTableUtil util;
@Inject
public MDSDatasetsRegistry(TransactionSystemClient txClient,
@Named("datasetMDS") DatasetFramework framework,
CConfiguration conf) {
super(txClient);
this.dsFramework =
new NamespacedDatasetFramework(framework, new DefaultDatasetNamespace(conf, Namespace.SYSTEM));
}
@Override
public void startUp() throws Exception {
this.util = new DatasetMetaTableUtil(dsFramework);
this.util.init();
}
@Override
public void shutDown() throws Exception {
}
@Override
protected MDSDatasets createContext() throws IOException, DatasetManagementException {
Map<String, ? extends Dataset> datasets = ImmutableMap.of(
// "null" for class being in system classpath, for mds it is always true
DatasetMetaTableUtil.INSTANCE_TABLE_NAME, util.getInstanceMetaTable(),
DatasetMetaTableUtil.META_TABLE_NAME, util.getTypeMetaTable()
);
return new MDSDatasets(datasets);
}
}